//工具函数
const serialize = param => {
  const results = [];
  for (const [key, value] of Object.entries(param)) {
    results.push(`${encodeURIComponent(key)}=${encodeURIComponent(value)}`)
  }
  return results.join('&')
}
const serializeJSON=param=>{
  return JSON.stringify(param)
}
//给url添加参数
const addURLData = (url, data) => {
  if (!data) return '';
  const mark = url.includes('?') ? '&' : '?'
  return `${mark}${data}`
}
export { serialize ,addURLData,serializeJSON}
